全球智库信息集成服务系统(G2TT): Spatial Variation of Soil CO2, CH4 and N2O Fluxes Across Topographical Positions in Tropical Forests of the Guiana Shield.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1007/S10021-018-0232-6
	Spatial Variation of Soil CO2, CH4 and N2O Fluxes Across Topographical Positions in Tropical Forests of the Guiana Shield.
	Courtois EA; Stahl C; Van den Berge J; Bréchet L; Van Langenhove L; Richter A; Urbina I; Soong JL
发表日期	2018
出处	Ecosystems 21 (7): 1445-1458
出版年	2018
语种	英语
摘要	The spatial variation of soil greenhouse gas fluxes (GHG; carbon dioxide—CO2, methane—CH4 and nitrous oxide—N2O) remains poorly understood in highly complex ecosystems such as tropical forests. We used 240 individual flux measurements of these three GHGs from different soil types, at three topographical positions and in two extreme hydric conditions in the tropical forests of the Guiana Shield (French Guiana, South America) to (1) test the effect of topographical positions on GHG fluxes and (2) identify the soil characteristics driving flux variation in these nutrient-poor tropical soils. Surprisingly, none of the three GHG flux rates differed with topographical position. CO2 effluxes covaried with soil pH, soil water content (SWC), available nitrogen and total phosphorus. The CH4 fluxes were best explained by variation in SWC, with soils acting as a sink under drier conditions and as a source under wetter conditions. Unexpectedly, our study areas were generally sinks for N2O and N2O fluxes were partly explained by total phosphorus and available nitrogen concentrations. This first study describing the spatial variation of soil fluxes of the three main GHGs measured simultaneously in forests of the Guiana Shield lays the foundation for specific studies of the processes underlying the observed patterns.
主题	Ecosystems Services and Management (ESM)
关键词	tropical forest GHG soil fluxes Guiana Shield soil characteristics spatial variation French Guiana
URL	http://pure.iiasa.ac.at/id/eprint/15152/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/131463
推荐引用方式 GB/T 7714	Courtois EA,Stahl C,Van den Berge J,et al. Spatial Variation of Soil CO2, CH4 and N2O Fluxes Across Topographical Positions in Tropical Forests of the Guiana Shield.. 2018.